I do not know if it is the same or not, but if it is a high quality 15w40 motor oil, you should be good. As for how much oil it takes? My 444 with remote hydro pto takes about 12 Qts. The 648 is a little more complex, so I would guess about 12/15 qts. Most of the cases should have the fluid about 5, to 6 inches below the top of the tank. Good luck.